Won't help your sight plane at all unless you stick a bead on the extended part... think about it. The ported ones offer some advantages... maybe. And, for sure... they really look cool! (No I'm not a teenager but my wife says I act like one sometimes.)
With chokes, I think you just gotta' try 'em and see what they do for you. A patterning board is a must. I have settled on a Briley Light Modified Extended (and ported) for dove AND quail... tight enough to make the long shots, but broad enough not to tear up the birds in close. I patterned it and it out-shot all the others I tried. I had big holes in the pattern with larger openings and I don't shoot that good anymore to handle the accuracy needed for the tighter ones (at my age, I AM subject to "senior moments.")